Valve grinder



Feb. 27, 1923.

J. E, KESSLER VALVE GRINDER Filed Mar, 51, 1922 INVENTQR,

. ATTORNEY.

Patented eh. 2?;

ll hl ,l al" El Ell" E JOHN ERNEST HESSLER, OF ,NGREISTOVBL ENNSYLVANIA.

v /invfn calunnia.

application ned irma si, ieee. serial no; 5485220.

To @ZZ whom. t may cof/acera:

Be it known that l; .loi-IN EnNns'r Kuss- Lnn, a citizen of the United States7 residing at llorristown,` in the county ot :Montgomery and State or' Pennsylvania, have invented a new and useful improvement in "Valve Grinders, of which the following isv a lspeciication. i

ln one of its aspects-the'principalv object l0 of the present invention is to provide tool for use in grinding valves which shall be satisfactory and reliable in use and yet siinpro-vided on each element or spindle and ofwhich the radius ot the driving element crank pin is less than the radius of the driven element crank pin, and a movable link having sliding crank pin connection to enable one element to make complete revolutions and the other element partial revolutions. The invention also comprises the improvenients to be presently described and finally claimed.

ln the accompanying drawings forming part hereof l have illustrated an embodiment of the invention selected lroin other embodiments for the sake oil description and in those drawings- Figure 1 is a. side view, partly in section7 of a valve grinder embodying features ot the invention.

F igs. 2 and 3 are sectional views taken on the line 2 2 of Figure 1 and illustrating two positions of the parts, and

Figs. 4L and 5 are views orp the crank pins.

In the drawings 5 is a driving element or spindle mounted for rotation in the housing` 6. 7 is a follower element lor spindle also mounted for rotation in the housing 6. is shown these spindles or elements 5 and 7 are mounted in axial alignment. 8 is a crank pin provided on the spindle 5. and 9 is a crank pin provided on the spindle or element 7. The radius ot the crankpin 9 in respect to the axis of oscillation oiE the spindie 7 is greater than the radius of the crank pin 8 in respect to the axis ol' rotation of the spindle 5. 10 is a movable link having sliding connection with eachI oi' the l'crank pins lf'he link 10 is shown as mounted within the housing and pivoted at 11 yto afford it mo tion, and the link 10 is provided 'with a slot 12 within which both pins y8 and 9 are aftoi-ded sliding motion. lThe housing 6 is shown as made in twojparts riveted together and as providedwit-h hubs 13, which cooperate with collars or enlargements 14 ony the spindles so as to take 'end thrust in the particular device shown 'in the drawingj and thehous'ing'is shownas provided with a handle 19 by which it is prevented from rotating.y 15 is anelectric drill which vis one means for causing the driving element or spindle 5 to make complete revolutions. 16 is a ydriver attached to the spindle 7 and adapted to engagek a valve as a, which it turns first in one direction for a part of a revolution-and then in the other direction for a part of a revolution in order to grind it. The crank pins 8 and 9 are shown as mounted on disks 17 and 18 secured eccentrically to the ends of the spindles 5 and 7 and these disks are arranged in offsets pro-v vided in the housing halves. The wall oit' the otlset for t-he disk 18 vmay be made to operate as an abutment or stopfor limiting the turning movement of the disk 18 which, when present, is al matter of convenience in assembling the parts. f

` ln use the crank pin 8 describes a circle and inoves in the same direction and Slides first in one direction and then in the other' in the slot 127 thus swinging the link 10 back and forth on the pivot 11. The swinging motion thus imparted to the liuk is transmitted from the latter to the crank pin 9 which works in the slot 10 and so the pin 9 is moved back and Jforth in the arc ol' -a circle and causes the spindle 7 to turn lirst in one direction and then in the other for a part of a revolution. p

lt will be obvious to those skilled in the art to which the invention relates that modifications may be made in details of construction and larrang'fement without departing from the spirit of the invention which is knot limited as to those matters or otherwise than as the prior art and the appended claims may require.

I claim: i l. Mechanism for converting rotary motion into oscillating motion which comprises the combination of a rotating driving element, 'means for causing` the driving element to make complete revoiutions in the same direction, a follower element adapted to make partial revolutions-in opposite directions, crank pins provided on cach element and ot which the radius oi the driving element' crank pin is less than the radius ot the driven element crank pins, and a movable link having slidable crank pin connection to enable one element to make complete revolutions and the other element to make partial. revolutions in opposite directions.

Valve grinder mechanism `for convertingrotary motion into oscillating motion which consists of the combination of a housing, a driving spindle mounted for rotation through a Wall of' thehousing and provided Withinithe housing with' a cra-nk pin. a follower spindle axially aligned with the first mentioned spindle and mounted for oscillation through a Wall of the housing and provided Within the housing With a crank pin arranged to reciprocate in the arc of a circle oi larger diameter than the diameter of the circle of a revolution of the first mentionedy pin, and a link pivotallv mounted in the housing and having a slot in Which both pins are slidably arranged.

3. Valve grinderl mechanismor convertlng rotary motion into oscillating motion which comprises thecombinatlon of a housing, a driving spindle mounted for rotation through a Wall oit the housing and provided Within the housing with a crank pin, a fol-l y lower spindle axially aligned With the lirst` mentioned soindle and mounted for oscilla` tion through a Wall of the housing and proi vided Within the housing vvitha crank pin,

and a link pivotallv mounted in the housing 

